Knife.



W. P. LUTZ, JR.

KNIFE.

APPLICATION FILED SEPT. 12, 1910.

` WITNESSES Z W a m. @hm N WILLIAM F. LUTZ, JR., or BROOKLYN, NEW YORK.

KNIFE.

Specification of Letters Patent.

Patented July 11, 1911.

Application filed September 12, 1910. Serial No. 581,665.

To all whom it may concern:

Be it known that I, WILLIAM F. LUTZ, J r., a citizen of the UnitedStates, and residing at Brooklyn, in the county of Kings and State ofNew York, have invented certain new Aand useful Improvements in Knives,of which the following is a specification, such as will enable thoseskilled in the art to which it appertains'to make and use the same.

This invention relates to knives, and particularly to butchers knives,carving knives, kitchen knives, table knives, and other knives of thisclass, and the invention relates more particularly to the constructionof the shank of the blade, and to the construction of the handle,whereby the blade may be removed from the handle and another bladeplaced in it whenever desired; a further object being to provide meanswhereby the blades of knives of the class specified, or other knives asmay be desired, may be quickly and easily detached from the handle andreconnected therewith; and with this and other objects in view theinvention consists in the construction hereinafter described andclaimed.

The invention is fully described in the following specification of whichthe accompanying drawings form a part, and in which the separate partsof the construction are designated by suitable reference characters, andin which Figure l is a side view of a knife of the class specified,involving my invention. Fig. 2 a longitudinal section on the line 2 2 inFig. l. Fig. 3 a side view of the shank portion of the blade detachedfrom the handle, and Fig. 4: a cross section on the line 4 4 of Fig. l.

In the practice of my invention I provide a handle a and blade b, andthe blade b is provided with a shank portion b2 which is approximatelyof the same width as the handle. The body portion of the shank b2 of theblade is provided adjacent to the blade with'a central longitudinal slotb3, and the end of the shank portion b2 opposite the blade is providedin one side edge thereof with an inclined recess b4 which extendstransversely thereof and to the transverse center thereof, and whichforms a hook member b5, and the opposite edge of the shank portion b2 ofthe blade is provided centrally with a transverse recess c6.

The handle a, in the form of construction shown, consists of two sidemembers c2, between which is a central longitudinal space or chamber aswhich is closed at one end and one side thereof, and this space orchamber a3 in the form of construction shown is formed by a metalliccasing a* which is placed between the side portions u2 of the handle asclearly shown in Figs. 2 and et.

Passed through the handle a and corresponding in position with theposition of the recess b4 and b in the opposite side edges of the shankb2 of thel blade are rivets c and d, the rivet c corresponding with therecess b4 in the shank of the blade, and the rivet d with the recess h6in the shank of the blade. The handle u is also provided in the endportion thereof opposite the rivet c with a transverse oblong slot cwhich extends entirely therethrough, and which is arranged at rightangles to the blade b, and which ranges longitudinally at said shank,and in which is pivoted as shown at c2 a flat oblong catch piece or dog7" having a handle portion f2 -which normally ts'in the longitudinalrecess f3 in one side of the handle a as clearly shown in Figs. l and 2,and the handle portion f2 is provided with a projecting finger piece 7"4which extends parallel with the blade Z) and projects beyond the bladeend of the handle a.

In order to connect the blade with the handle, the catch piece or dog fis turned out in the direction indicated by the arrow x in Fig. 2. Theend of the shank b2 of the blade b is then inserted into the chamber a3and manipulated so that the rivet c will pass into the recess b4, afterwhich the blade is turned down or swung down in the handle as shown inFigs. 1 and 2, after which the catch piece or dog f is swung down intothe locking position as shown in Fig. 2. In this operation of connectingthe blade with the handle, and when the shank of the blade has beenconnected with the rivet c, and the blade swung down into the handle,the rivet d enters the recess 56 in the shank of the blade, and when thecatch piece or dog f is swung into locking position, the blade issecurely locked in the handle and cannot be removed without firstswinging the catch piece or dog f out of the slot or recess c in thedirection of the arrow The catch piece or dog f is so formed as to fitsnugly in the locking position as shown in Fig. 2 110 by friction, andthe outer edge thereof when W'sh'own andmdescribed and 'the completeYdesaid catch piece or dog is in operating posit-ion is flush Vvvith theside of the handle.

It Will be understood that the knife blade as shown andV described is ormay be provided as an article of manufacture independently of thehandle, and the handle is or may also be provided independently of theblade in the same manner, or the blade and handle may be made andconnected as vice or knife may be placed on t-he market as a Whole.

My invention is not limited to the material of which the handle iscomposed, nor to the exact details of the construction thereof ashereinafter shown and described, and Various changes therein andmodifications thereof may be made, Within the scope of the appendedclaims, Without departing from the spirit of my invention'or sacrificingits advantages.

Having fully described my invention, What I claim as new and desire tosecure'by Letters Patent of the United States is l. A knife bladeprovided with a shank, one side edge of which is provided adjacent tothe end thereof, With a transverse recess forming a hook member, theopposite side edge being provided centrally with a transverse recess,and the body thereof being provided adjacent to the blade with alongitudinal slot.

2. A knife of the class described, said knife comprising a bladeprovided with a shank, one side edge of Which is provided adjacent tothe end thereof Wit-h a transverse recess forming a hook member, the

opposite side edge being provided centrally with a transverse recess andthe body thereof being provided adjacent to the blade With alngit-udinalslot;V and a handle provided"V ,pivoted lock device adapted to "enterthe longitudinal slot in the shank of the blade.

In testimony that I claim the foregoingas my invention I have signed myname 1n presence of the subscribing Witnesses this 22nd day of August,1910.

WILLIAM F. LUTZ, JR. Witnesses:

B. M. RYERsoN, C. E. MULREANY.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents. Washington, D. C.

